ip_id.h File Reference

IP-ID decompression routines. More...

#include <stdlib.h>
#include <stdint.h>

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Data Structures
struct	d_ip_id_decode
	Defines a IP-ID object to help computing the IP-ID value from an IP-ID offset. More...
Functions
void	d_ip_id_init (struct d_ip_id_decode *const ip_id, const uint16_t ip_id_ref, const uint16_t sn_ref)
	Initialize an IP-ID object.
int	d_ip_id_decode (const struct d_ip_id_decode *const ip_id, const uint16_t m, const size_t k, const uint16_t sn, uint16_t *const decoded)
	Decode the IP-ID offset in a ROHC packet and compute the associated IP-ID.
void	d_ip_id_update (struct d_ip_id_decode *const ip_id, const uint16_t id_ref, const uint16_t sn_ref)
	Update the reference values for the IP-ID and the SN.

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Detailed Description

IP-ID decompression routines.

Author:

Didier Barvaux <didier.barvaux@toulouse.viveris.com>

The hackers from ROHC for Linux

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Function Documentation

int d_ip_id_decode	(	const struct d_ip_id_decode *const	ip_id,
		const uint16_t	m,
		const size_t	k,
		const uint16_t	sn,
		uint16_t *const	decoded
	)

Decode the IP-ID offset in a ROHC packet and compute the associated IP-ID.

Parameters:

ip_id	The IP-ID object
m	The IP-ID offset
k	The number of bits used to code the IP-ID offset
sn	The SN of the ROHC packet that contains the IP-ID offset
decoded	OUT: The computed IP-ID

Returns:

1 in case of success, 0 otherwise

References f(), d_ip_id_decode::id_ref, and d_ip_id_decode::sn_ref.

Referenced by decode_uo0(), decode_uo1(), and decode_uor2().

void d_ip_id_init	(	struct d_ip_id_decode *const	ip_id,
		const uint16_t	id_ref,
		const uint16_t	sn_ref
	)

Initialize an IP-ID object.

Parameters:

ip_id	The IP-ID object to initialize
id_ref	The IP-ID reference
sn_ref	The reference Sequence Number (SN)

References d_ip_id_decode::id_ref, and d_ip_id_decode::sn_ref.

Referenced by ip_decode_dynamic_ip(), and rtp_decode_dynamic_rtp().

void d_ip_id_update	(	struct d_ip_id_decode *const	ip_id,
		const uint16_t	id_ref,
		const uint16_t	sn_ref
	)

Update the reference values for the IP-ID and the SN.

Parameters:

ip_id	The IP-ID object
id_ref	The new IP-ID reference
sn_ref	The new SN reference

References d_ip_id_decode::id_ref, and d_ip_id_decode::sn_ref.

Referenced by decode_uo0(), decode_uo1(), and decode_uor2().